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Why & Where &When to Use EJB,JMS, Web service in application

 
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Why & Where &When to Use EJB,JMS, Web service in application
 
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Do you know what EJB, JMS and web services are? If not, then do some research to learn what those things are, and you'll get an idea of when they would be useful.
 
jacob deiter
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yes ,I know basic of those technologies,but the It seems that its objective is moreover same.I cant correctly differentiate the objective of the them.Core idea of those technologies is for Distributed system.

So please help in this .It is really take my time full
 
Jesper de Jong
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EJB (Enterprise Java Beans), JMS (Java Message Service) and web services are three different things. They don't have the same uses and cannot be substituted for one another in a software system. They don't have the same purpose or objectives.

You can implement business logic in a message driven EJB, which receives messages via JMS. You could also make the business logic in the EJB accessible via a web service.

Also see Sun's Java EE tutorial.

 
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